fix(app): allow additive task lists and admonitions in native prose

docs/native-text-selection.md

@@ -15,11 +15,11 @@ commonmark: strike=0 tasks=0 quotes=1 spoilers=1
 github: strike=1 tasks=1 quotes=1 spoilers=1
 ```
 
-Paseo's existing parser does not implement task lists. Escape task markers during inline preparation so `[ ]` and `[x]` remain literal text after a bullet, in both streaming and settled replies. Leave task toggling disabled.
+GitHub flavor renders `[ ]` and `[x]` list items as checkboxes. Toggling is disabled because changes would not persist. Preserve task markers in both streaming and settled replies.
 
 ## Compatibility constraints
 
-- Disable `latexMath`. Dollar-delimited text must stay literal. Disable admonitions too; they would reinterpret existing quote content.
+- Disable `latexMath`. Dollar-delimited text must stay literal. Enable admonitions for `[!NOTE]`-style quotes; they add formatting without hiding the quote content. Ordinary quotes keep the existing blockquote style mapping.
 - Spoilers have no public parser switch in 1.1.1. Prepare inline text with escaped pipes so `||text||` stays visible. Preserve pipes inside code and link destinations.
 - `lineHeight` is a minimum. Use the Markdown theme's line height; font metrics can still increase it.
 - Strikethrough color is iOS-only. Android uses the surrounding text color.

packages/app/src/components/markdown-prose/prepare.test.ts

@@ -91,13 +91,17 @@ it.each([false, true])(
   },
 );
 
-it.each(["- [ ] Task", "- [x] Done", "1. [X] Done", "- parent\n  - [ ] Nested task"])(
-  "keeps task markers literal through streaming and settlement: %s",
-  (text) => {
-    const settled = prepareProse(text, noFiles);
-    const streaming = prepareProse(text, noFiles, true);
-    expect(settled).toMatch(/\\\[/);
-    expect(streaming).toBe(settled);
-    expect(parser.render(settled)).toBe(parser.render(text));
-  },
-);
+it.each([
+  "- [ ] Task",
+  "- [x] Done",
+  "1. [X] Done",
+  "- parent\n  - [ ] Nested task",
+  "> [!NOTE]\n> Keep this note",
+  "> Ordinary quote",
+])("preserves native block markers through streaming and settlement: %s", (text) => {
+  const settled = prepareProse(text, noFiles);
+  const streaming = prepareProse(text, noFiles, true);
+  expect(settled).toBe(text);
+  expect(streaming).toBe(settled);
+  expect(parser.render(settled)).toBe(parser.render(text));
+});

packages/app/src/components/markdown-prose/prepare.ts

@@ -60,6 +60,15 @@ function renderInline(tokens: Token[], canResolveCode: (text: string) => boolean
     .join("");
 }
 
+function preserveNativeBlockMarker(source: string, rendered: string): string {
+  const marker = source.match(
+    /^\[(?:[ xX]|!(?:NOTE|TIP|IMPORTANT|WARNING|CAUTION))\](?=\s|$)/,
+  )?.[0];
+  if (!marker) return rendered;
+  const escaped = escapeText(marker);
+  return rendered.startsWith(escaped) ? marker + rendered.slice(escaped.length) : rendered;
+}
+
 /** Keep the existing inline dialect, including literal pipes and tappable inline paths. */
 export function prepareProse(
   text: string,
@@ -88,7 +97,10 @@ export function prepareProse(
         if (child.type === "text") child.content = child.content.toUpperCase();
       }
     }
-    const rendered = renderInline(token.children, canResolveCode)
+    const rendered = preserveNativeBlockMarker(
+      token.content,
+      renderInline(token.children, canResolveCode),
+    )
       .replace(/ $/, " ")
       .split("\n");
     const replacement = rendered.map(

packages/app/src/components/markdown-prose/renderer.native.tsx

@@ -9,7 +9,7 @@ import type { MarkdownProseProps } from "./props";
 import { inlineCodeLinkContent, prepareProse } from "./prepare";
 
 const ThemedMarkdown = withUnistyles(EnrichedMarkdownText);
-const MD4C_FLAGS = { latexMath: false, hardSoftBreaks: true, admonitions: false };
+const MD4C_FLAGS = { latexMath: false, hardSoftBreaks: true, admonitions: true };
 
 function proseStyleMapping(theme: Theme): { markdownStyle: MarkdownStyle } {
   const styles = createMarkdownStyles(theme);